Transition-metal complexes of cyclohexane-1,2-dione bis(thiosemicarbazone)(H2L). Crystal structures of [ZnL(OH2)]·dmf (dmf = dimethylformamide) and [Zn(H2L)Cl]Cl·2H2O
- 1 January 1995
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 13,p. 2297-2303
- https://doi.org/10.1039/dt9950002297
Abstract
The reaction of chlorides and acetates of FeII, NiII, CuII and ZnII with the polydentate ligand cyclohexane-1,2-dione bis(thiosemicarbazone)(H2L) led to the formation of some novel complexes which have been characterized by spectroscopic methods (NMR, IR). The crystal structures of the two compounds [ZnL(OH2)]·dmf (dmf = dimethylformamide)1 and [Zn(H2L)Cl]Cl·2H2O 2 have been determined. In both complexes the co-ordination geometry about zinc is distorted square-planar pyramidal. The axial sites are occupied by a water molecule in 1 or by a chlorine atom in 2. The ligand is dideprotonated in 1 and neutral in 2, so that in 1 a higher π-delocalization is observed.Keywords
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